Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ae1aee37d22278a…

MALICIOUS

PDF

75.8 KB Created: 2021-03-24 13:36:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6bfd4b276da3ba57f9002c1bbb164a62 SHA-1: b104514432a65baa73b6ca76178e2e7f0f67170e SHA-256: 7ae1aee37d22278a0a367da167b64f0bea4833aef6d1291fd050b616d506af02
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The presence of a URL with a 'utm_term' parameter further supports the idea of tracking user interactions, common in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://pelibifir.ru/strik?utm_term=what+are+some+possible+themes+of+this+story PDF link annotation
    • https://cdn.sqhk.co/kawiwitifa/i3nsPia/jigujovudupideratuduv.pdfIn PDF document text
    • https://bugebapujeze.weebly.com/uploads/1/3/1/6/131606260/3316622.pdfIn PDF document text
    • https://cdn.sqhk.co/dowepigakaw/cyjbggi/download_game_kingdom_medieval_mod_apk_versi_terbaru.pdfIn PDF document text
    • https://cdn.sqhk.co/xovepejegosi/IibgdO3/98234163759.pdfIn PDF document text
    • https://cdn.sqhk.co/xavexapoxiv/NoQjdia/vazinifagopipol.pdfIn PDF document text
    • https://kelogukagikuval.weebly.com/uploads/1/3/0/7/130739039/9e20239.pdfIn PDF document text
    • https://defilapaxupote.weebly.com/uploads/1/3/5/3/135335242/3658e.pdfIn PDF document text
    • https://cdn.sqhk.co/reruzemafow/cu6ygey/61638155881.pdfIn PDF document text
    • https://rilubaka.weebly.com/uploads/1/3/5/3/135303332/fapuminur-niviwugagige.pdfIn PDF document text
    • https://wuripofowiwafu.weebly.com/uploads/1/3/4/3/134332549/15caeeb47afa07.pdfIn PDF document text
    • https://wefigoga.weebly.com/uploads/1/3/4/0/134041661/faripo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/42226173792.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/activits_pour_apprendre_le_franais.pdfIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/luzuwomoluvebal.pdfIn PDF document text
    • https://2f8a6ab9-e864-4757-b083-6627a13f4c48.filesusr.com/ugd/405339_9e8e71715ce04f368152987cf02919db.pdf?index=trueIn PDF document text
    • https://acfc0e76-311d-46af-9c13-f46c112eb424.filesusr.com/ugd/f90bad_2fb7a7e5b4044018931d16cada48be9d.pdf?index=trueIn PDF document text
    • https://6998e30b-c911-4113-ab34-4c15204891c7.filesusr.com/ugd/429b25_7c8b04f0e061439dbbdd5cd60e50e4b7.pdf?index=trueIn PDF document text
    • https://e41bb7a9-a35b-4578-ac27-1eab720d379a.filesusr.com/ugd/8912ce_c4fc10babbc84f5593c9118451034cc9.pdf?index=trueIn PDF document text
    • https://29ca30ec-7ad4-487f-8637-d2d67f3a323c.filesusr.com/ugd/10b11f_695424ce230c4569a61a372a7046ef67.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/gegorogox.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA75 5396 bytes
SHA-256: 89f6eac886f6b4a2fa7187b22b6f95a09975a13933095d83216194d62a5b9b73
font_01_sfnt_off0000fcb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB4 11376 bytes
SHA-256: d5809515e31db53bbed1f06526e56f2028bffaad271222c3d009ca699dfe70d8